The First Battle of the Marne was a WW I battle fought from 5–12 September 1914. It is generally regarded as one of the most important battles of the war. The battle was fought between the allies and the Germans. It was the allies first major victory in the war and it possibly saved France and Britain from defeat in 1914. The battle was fought on the very edge of Paris and its hinterland and was a counter-attack by the French field army and the British Expeditionary Force leading to the German withdrawing from the area around Paris. The Battle of the Marne was a victory for the Allies, but it also set the stage for four years of trench warfare stalemate on the Western Front. This article will discuss the reasons for the allied victory at the Marne.